The FAA min is 4 FA's UAL Max is 6 FA's . Most HNL flts on a 757 are staffed w/ 5 FA's 2 work up front and 3 in the back. So if you bring 8 items to incl the cockpit . You'll be safe. Enjoy your trip.
Here are some other FAA mins so you don't have to do the math.
737 = 3 FA's
319 & 320 ( not TED!!) =3 FA's
TED = 4 FA's (no matter the load)
757 = 4 FA's
757 p.s. = 6 FA's but can fly w/ 4 FA's
767 = 5 -6 FA's
777 = 8 FA's
747 = 9 FA's
As the cockpit it's 2 for the NB and WB int'l it's 3 if the flt time is under 12hrs. 4 if over.