How many mL should be added?

Patient: 49 year old man weights 252 Lb.
Rx order: 2,000 units/kg Polymixin B sulfate in 300 mL D5W by IV drip. Polymixin B sulfate is available in 10 mL vials containing 1,000,000 units and may be reconstituted with 0.9% NaCl injection. If the Polymixin B powder is dissolved in 5mL 0.9% NaCl, how many milliliters of the reconstituted solution should be added to the bag of D5W to prepare the infusion?