Pocket 6's with M=4

[Toopskees]

Home game. Started with 22 players, currently down to 2 tables of 6 each. Top 4 places pay. I have T4900. Villain in this case is table chipleader with around T9000. Other stacks are slightly higher or lower than mine. Blinds are 400/800, but are going up to 600/1200 in next 2 or 3 hands. Villain is a solid thinking player who has used his big stack to his advantage and has played fairly aggressively once he got the chip lead.
Villain open-raises UTG to 2000. I am next to act with pocket 6's. Fold, call or push?