Matching on content-type in htaccess

I know I can use FilesMatch "\.html$" like this:

<FilesMatch "\.html$">
    Header set Pragma "public"
    Header set Cache-Control "public, must-revalidate, proxy-revalidate"
</FilesMatch>

But this won't help if the html is delivered as a SEO friendly URL (like wordpress does), right?

I there a way to match on content-type equals text/html?