Borgata $750 - Overpair facing flop C/R vs. rock

[Todd Terry]

Early on, blinds 25/50, started with 6000, Villain has 6000, I have 6600. I recognize Villain, in his 50's or 60's, as a guy I played with about 1 1/2 years ago for 4-5 hours. He's a knowledgeable player and a complete rock. I'm fairly sure he doesn't recognize me.

Villain raises UTG to 200, I'm 2 to his left and make it 700 with KK. Everyone folds, Villain calls. Flop: Q 5 4 rainbow. Villain checks, I bet 1000, he immediately makes it 2500. Your action?