Does it seem to be idling low, also? It'* possible the pointer on your tach could be a bit off. The idle speed is controlled by the PCM mostly by adjustment of the idle air control. You could try cleaning that, as well as the throttle body and MAF sensor.
Mine idles at 650...however it DOES drop about once or twice during a stoplight and the automatic choke kicks in and brings it back up. I'm hoping that replacing the PCV valve will do something to correct the problem. But, I was under the impression that 650 was the OEM idle speed, not 750. Maybe the SE'* are different from the SSEi'*?