If you're talking about the FMV scene in Burmecia where Kuja rides his dragon after you're defeated by Beatrix. You can find that song on the "Final Fantasy IX Original Soundtrack Plus" which is basically all the music in the CGI scenes.

That particular scene is called. "Kuja leaving Burmecia." Not a very grand title, but pretty self explantory. ;p

I don't have this particular cd, but I'll look around and see if I have any luck finding an mp3 of it.