I believe it's just a nice perching tree for some other species. I looked through the window screen and saw a female Oriental Magpie-robin just sitting there. A couple days ago , I had heard this same sound. I sprung up then too, only to see a Greater Coucal. This large non-parasitic cuckoo is fairly common, though it is rather shy.
Most folks see it flying away or heading for cover.
You'd seldom see one sitting out in the open. It does happen at times though. It was exceedingly different from the coucal's normal call. It wasn't until today that I actually got my gift. On this day, this rainy Sunday after a week and a half of grieving over the recent horrible tragedy and worrying about my family back in Virginia, I would get something special.