The removal of a volatile organic compound (VOC) from a wastewater can be described by a first order reaction with a reaction rate constant of 5 day-1. The wastewater has a flow rate of 150 m3/hr, and is treated in a series of two completely mixed flow reactors which each have an equal volume. If the influent VOC concentration is 10 mg/L, what should the volume of each reactor be to produce an effluent concentration of 0.1 mg/L?