rmagickがインストールできません

前提・実現したいこと

rails gem のrmagickを導入しようとしたところ以下のようなエラーが出てしまいます。
rmagickを導入するにどうしたらよろしいでしょうか？

発生している問題・エラーメッセージ

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /usr/local/rvm/gems/ruby-2.3.0/gems/rmagick-2.16.0/ext/RMagick
/usr/local/rvm/rubies/ruby-2.3.0/bin/ruby -r ./siteconf20170515-14421-1qrgr9t.rb extconf.rb
checking for gcc... yes
checking for Magick-config... no
checking for pkg-config... yes
Package MagickCore was not found in the pkg-config search path.
Perhaps you should add the directory containing `MagickCore.pc'
to the PKG_CONFIG_PATH environment variable
No package 'MagickCore' found
checking for outdated ImageMagick version (<= 6.4.9)... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=/usr/local/rvm/rubies/ruby-2.3.0/bin/$(RUBY_BASE_NAME)

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /usr/local/rvm/gems/ruby-2.3.0/extensions/x86_64-linux/2.3.0/rmagick-2.16.0/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /usr/local/rvm/gems/ruby-2.3.0/gems/rmagick-2.16.0 for inspection.
Results logged to /usr/local/rvm/gems/ruby-2.3.0/extensions/x86_64-linux/2.3.0/rmagick-2.16.0/gem_make.out

An error occurred while installing rmagick (2.16.0), and Bundler cannot continue.
Make sure that `gem install rmagick -v '2.16.0'` succeeds before bundling.

該当のソースコード

Gemfile

gem 'rmagick'

試したこと

公式や、似たようなエラーのかたの対処方法のコマンドを試してみたりしましたがダメでした。

補足情報(言語/FW/ツール等のバージョンなど)

clodu9 Ruby on Rails