While eating fish, you feel that the fish needs a little vinegar. Unfortunately, you add way too much. To lower the acidity of the fish again, you decide to add packets containing 3 moles each of sodium acetate. You estimate that you have added 1 mole of vinegar to your fish based on the fact that it has a pH around 2. Given that the pKa of acetic acid is 4.74, to the nearest whole packet, how many packets of sodium acetate must you add to the fish in order to bring the pH up to around 5.5?