mod rewrite and friendly URL’s

i am working on setting up some friendly URL’s for our site and am looking for some advice.

Looking for https://www.sixteenfifty.com/?page_id=2 to become https://www.sixteenfifty.com/about/

We have used this in the past in an .htaccess file and it has worked but i cant seem to get it to go for this.

RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /\?page_id=2\ HTTP/
RewriteRule ^(.*)$ https://%{HTTP_HOST}/about/? [R=301,L]

Thanks for any help!
kmaier