[grando]

I just stoved his range for raising and calling a 3-bet preflop, and it looks like you should call his 400BB flop push:

Text results appended to pokerstove.txt

5,666,760 games 0.031 secs 182,798,709 games/sec

Board: 2c 7d Qs
Dead:

equity win tie pots won pots tied
Hand 0: 89.351% 89.35% 00.00% 5063292 0.00 { AA }
Hand 1: 10.649% 10.65% 00.00% 603468 0.00 { A2s+, K2s+, Q2s+, J2s+, T2s+, 92s+, 82s+, 72s+, 62s+, 52s+, 42s+, 32s, A2o+, K2o+, Q2o+, J2o+, T2o+, 92o+, 82o+, 72o+, 62o+ }