ASRS 2058266

I was PIC of Aircraft X orbiting a police scene at 1000 ft. AGL approximately 9 miles SW of ZZZ outside of the Bravo [airspace]. I observed on my Foreflight Ipad Aircraft Y, a Bell 407 helicopter operated by Company A approaching me from the Southeast at a distance of 3 miles and at 1100 ft. AGL. I immediately announced my position on the local helicopter frequency (XXX.XX). Aircraft Y did not deviate his flight path and continued straight at my position. I again announced my position when he was 2 miles to my South/Southeast with no response. When he was approximately 1 mile from me, I announced again with no response. At this time, I took evasive action and quickly descended 300 feet as Aircraft Y flew directly over the top of me. He never deviated his course, never announced his position, nor did he respond to my numerous calls on the local frequency. As he approached ZZZ1 Class D, I switched over to that frequency to listen. Aircraft Y called up the ATC of ZZZ2 and asked for permission to transition through the Delta [airspace]. I have a recording of the flight tracker of this near miss.