Preflop open 57%
Flop: T77r

Flop ch range:

We will ch 457 combo's on the flop.
We should defend around 0.6*457=274 combo's vs a 3/4 bet

Now we have 277 combo's left, but this is include hands that can't be xcalling.
What should we do?
-checking more of our Tx hands
-ch same range and ch/fold more than 40% and only ch/call A8+/1p hands.