How can I estimate pressure altitude?
You are 1498ft above the place where the pressure is 27.83InHg. So how high are you above the place where the pressure is 29.92InHg?

27.83 is 2.09InHg higher than 29.92, ie roughly 2090ft higher. So you are 1498 + 2090 above the place where the pressure is 29.92InHg, ie your Pressure Altitude is ~3588ft.