Folding Queens after turn with possible straights and sets?

PokerStars No-Limit Hold'em, $0.05 BB (8 handed) -

saw flop

Hero (UTG) ($6.57)
UTG+1 ($7.09)
MP1 ($3.60)
MP2 ($3.80)
CO ($12.34)
Button ($5.33)
SB ($12.50)
BB ($4.09)

Preflop: Hero is UTG with Qc, Qd
Hero bets $0.15, 1 fold, MP1 calls $0.15, 5 folds

Flop: ($0.37) 7c, 6h, 4h (2 players)
Hero bets $0.20, MP1 raises to $0.40, Hero calls $0.20

Turn: ($1.17) 4s
(2 players)
Hero checks, MP1 bets $1.10, Hero ???

What should I do?