Fold a set to CR?

[Rococo]

I was not the Hero or the Villain in this hand. I am posting the hand to prove a point. Table is down to four players. Hero in this hand has $2500 in chips. Villain in the BB has him covered.

Preflop

Hero raises to $400 on the Button with red jacks. SB folds. BB calls.

Flop is TJQ rainbow. Villain checks. Hero bets $400 (half-pot), leaving himself with $1700 behind. Villain check-raises all-in. Hero folds.

You should assume that Villain is a typical $20 buy-in SNG donkey. Fire away.