Please take a look at this page and click the image to go

Please take a look at this page and click the image to go to the lightbox.
http://divinationbygeorge.com/home/bearing-balanced-l-rods-foam-handle-bbfh/

I need to make the maximum height of the image in the lightbox 750px, vertically centered.

I looked at the CSS and couldn't figure out the selector. - Maybe it requires something more that CSS?