Keith at the first break

Keith has had a challenging day so far.  In the 9th hand of the day he got dealt 77 in the SB.  He called with 2 limpers and the BB checked his option.  The flop came 972 all hearts.  The first limper bets out, the second one folds, Keith called and the BB folded.The turn is the 2C - check, check.  The river is the JD.  The villain leads out and Keith shoves with his 777JJ boat. Villain shows 99 for the higher boat.  That knocked Keith down to 4,100 but he has doubled up a couple times and now has 19,650.  With blinds going to 300/600/75 Keith still has just over 30 BB to make a move...