Portland is 13.5 hours behind Hyderabad
There is no standard 8-to-6 overlap. Someone joins early or late.
Given Portland is 13.5 hours behind Hyderabad, the realistic answer is that there's no convenient shared slot during normal business hours. Catch the edges of the day: the last hour for Hyderabad or the first hour for Portland is usually the least painful option. Just remember Portland changes its clocks for daylight saving and Hyderabad doesn't, so confirm the overlap whenever the seasons turn.