A client receives a prescription for an intravenous (IV) infusion of 5% Dextrose Injection, USP in 0.45% Sodium Chloride Injection, USP at 55 mL/hour. The IV administration set delivers 10 gtt/mL. The nurse should regulate the drop rate to deliver how many gtts/minute? (Enter numerical value only. If rounding is required, round to the nearest whole number.)